permissible > define
adjective
- That may be permitted especially as according to rule.
- usage: "permissible behavior in school"; "a permissible tax deduction"
- synonyms: allowable
- That may be accepted or conceded.
- usage: "a kind of speculation that was permissible in cosmology but inadmissible in medicine"
by WordNet 3.0 © 2006 by Princeton University